The time server stratum is the position at which a time server operates in the NTP hierarchy.
A stratum 1 time is directly connected to a reference clock and is at the top of the time server hierarchy.
A stratum 2 time server receives the time from one, or more, stratum 1 time servers. Stratum 2 time servers are not significantly less accurate than stratum 1 time servers.

Use the
Inactive option of ServerStratum to mark your
TimeServer as Inactive.